JPH04263627A - Twister - Google Patents

Abstract

PURPOSE: To provide a twisting machine which can give an extremely general tension to raw yarns and the produced twisted yarn in a simple structure and reduce the inertia of a rotary assembly. CONSTITUTION: In this twisting machine equipped with an adjuster, the adjuster has a generally cylindrical main body having a clearance over its whole length as a main portion. The final end of the cylindrical main body is freely movably elongated with a disk whose diameter is larger than the diameter of the cylindrical main body which supports two guide eyes. The two guide eyes define a right triangle or a substantially right triangle together with the inlet of the outlet channel of the twisted yarn. The major side among the two sides nipping the right angle in the right triangle is substantially disposed along the rotation axis of a cable head. A twisting point for two raw yarns is positioned so as to be stabilized at the central point of the major side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn machine for producing strands, in other words very long textile components, made by twisting together at least two raw yarns.

0002

BACKGROUND OF THE INVENTION FIG. 1 is a reference to what is illustrated in French Application No. 2,565,261 (which corresponds to US Application No. 4,592,195). As is clear from Fig. 1, a yarn machine generally consists of a plurality of independent working terminals arranged side by side, each working terminal having an unwinding double thread capable of twisting two yarns 1 and 2 together. It has an assembly similar to a thread spindle (abbreviated as DT assembly).

In this type of machine, yarn 1 taken from a supply source (not shown) reaches the lower end of a hollow spindle 3 of a DT assembly and passes through channels formed radially in a disc 3a. As the spindle 3 rotates, the yarn 1 is temporarily twisted to form a balloon 1a surrounding the bowl 3b of the spindle 3 of the DT assembly. Also, inside the bowl 3b is a bobbin 4 of the yarn 2.
is located. This yarn 2 is the cover 3 of the bowl 3b.
c, it passes through a braking device 6, also called a "tensioning device". The yarns 1 and 2 are then twisted together by a cable head 7, commonly called a "cable head" or "length adjuster". Hereinafter, the yarn obtained by this twisting will be referred to as a twisted yarn. After the two yarns 1, 2 have been twisted together at the exit of the cable head 7, the strands 8 pass through a part 9 that fixes the twisted runback. Then, the direction is changed via the deflection guide 10 and sent to a conventionally commonly used system.

Conventionally, the cable head 7 mainly consists of a rotating assembly mounted on an upper bearing 12 and a rotating shaft coinciding with the axis of the spindle 3. Generally, this rotating assembly has two pulleys 13, 14 arranged coaxially with an axis intersecting the axis of the spindle 3, which are in an angular relationship to each other. The yarns 1 and 2 are wound around these pulleys 13 and 14,
They come together at twist point 15. It then passes through the axial channel of the rotating assembly to be conveyed to the twist-runback fixation system. Cable heads with such rotating pulleys have been known for quite some time, in particular from French Application No. 1,208,273 and French Application No. 1,2.
No. 02,572. French application No. 1, 20
No. 2,572 also relates to two pulleys mounted on a support along an axis coincident with the axis of the two pulley spindles, instead of being mounted on an axis intersecting the axis of the spindle 3 as described above. Examples are described. In such cable heads and regulators, the balloon 1a
The rotational drive is obtained either by the outer yarn 1 forming the outer yarn 1 or by fully synchronizing the individual motors.

[0005]

[Problems to be Solved by the Invention] One of the main problems of the present invention is to provide extremely uniform tension to the raw yarn and the produced strands, and to minimize the inertia of the rotating assembly. That's true. A further challenge is to facilitate the maintenance of the cable head and to be able to easily attach the thread to the rollers. Another object of the present invention is to solve the above problems with an extremely simple configuration. The object is not only to be able to solve all the problems mentioned above, but also to provide a yarn machine with a regulating assembly without deflection pulleys or rollers for the yarn.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a DT assembly similar to an unwinding double thread spindle capable of twisting two yarns 1 and 2 together. The first yarn 1 of the two yarns forms a balloon 1a surrounding the bowl 3b, and the two yarns are placed inside the bowl 3b. A bobbin 4 of a second yarn 2 of the book yarns is arranged, said two yarns 1, 2 being brought together in said regulator or cable head 7 consisting of a rotating assembly mounted on a bearing 12;
The axis of rotation of the rotary assembly coincides with the axis of the spindle 3, and the regulator or cable head 7 has a generally cylindrical body 25 having a passage gap 26 throughout its length; Gap 26-2
The two side surfaces 27a, 27b are parallel to the generatrix of the cylindrical main body 25, and the cylindrical main body 25 has a disk 27 having a larger diameter than the cylindrical main body 25 supporting two guide eyes 28, 29. The first guide eye 28 of the two guide eyes is located near the outer periphery of the disk 27, and the first raw filament forming the balloon 1a 1 passes through its interior, said balloon 1a drives said assembly in rotation during the production of twine 8, the second of said two guide eyes 29 coinciding with the axis of rotation of said assembly. A second yarn 2 coming from the bobbin 4, located at or in the immediate vicinity of the bowl 3b, passes therein, these two guide eyes 28, 29 directing the strands 8
defines, together with its inlet 30 into the outlet channel coming from said cable head 7, a right triangle, or a substantially right triangle, in which the longer sides of the right angle are substantially connected to said cable. It is along the rotation axis of the head 7, and is characterized in that it is positioned so that the twisting point 33 of the two yarns 1 and 2 is stably positioned at the midpoint of the long side.

[0007]

[Operation] According to the above-described structure, many slipping points and friction points in the yarn path are eliminated, and the twisting point of the two yarns is perfectly positioned and stabilized. The cable head also takes the form of a removable assembly which can be mounted on the support frame of the machine by means of bearings so that it is driven in rotation. Moreover, the two yarns are reliably guided by the two guide eyes even without a guide roller, and are twisted together at the twisting point.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows French application No. 2,565,26.
No. 1 (this application corresponds to U.S. Application No. 4,592,195) shows a thread machine embodying the technology disclosed in U.S. Application No. 4,592,195. This yarn machine comprises a yarn head (or regulator) with rollers and a rotary drive mechanism for producing a strand obtained by a balloon formed by one of the two yarns. . Figure 2(a)~
(c) shows details of an embodiment of a cable head (or length adjuster) according to the invention for relating two yarns without guide rollers; Figures 3(a)-(
c) and FIGS. 4(a) to 4(d) show two embodiments of a cable head (or length adjuster) according to the invention with guide rollers for the yarn. 5 and 6 illustrate one embodiment of an integrated assembly according to the invention. This assembly has a cable head mounted directly on a length adjuster (or tensioning device) for the yarn coming from the bobbin, which is arranged inside the can of the double thread spindle. This invention is based on a "cable head" that a machine of the type shown in FIG.
It also relates to a "length adjuster" and relates to a new type of assembly that integrates a brake device (tension device) and a cable head or length adjuster. We have already given details of the general construction of machines of this kind;
Components that are the same as those in the prior art are designated by the same reference numerals, and descriptions thereof will not be repeated.

In the three embodiments shown in FIGS. 3, 4 and 5, the cable head 7 is connected to the support frame 20 (
It is only illustrated in FIG. ) by a bearing 12, and is directly rotationally driven by the balloon 1a of the yarn 1 during normal operation. This installation is done by positioning the hollow shaft 21, which is formed inside the bearing 12 and serves as an outlet for the strand 8, using a rotary bearing 22. As can be seen from these figures, the cable head 7 is configured to be removably mounted inside the bearing 12. In the three illustrated embodiments, the removable assembly forming the cable head 7 consists essentially of a generally cylindrical body 25 having a gap 26 throughout its height, the sides 27a of the gap 26, 27b is parallel to the generatrix of the cylindrical shape 25. This cylindrical main body 25 is extended by the free movement of its terminal end by a disk 27 having a larger diameter. And disk 27
has an inclined surface, as shown in FIGS. 2 and 4, or a simple horizontal surface, as shown in FIG. The cable head 7 is also made of molded plastic or other material to be as light as possible to reduce inertia.

As is clear from the figure, the disc 27 supports two guide eyes 28, 29. The guide eye 28 is located near the outer peripheral edge of the disk 27 and guides the yarn 1 forming the balloon 1a. The balloon 1a then rotates the cable head 7 while the twine 8 is being produced. Guiding eye 2
9 is located at a location that coincides with the axis of rotation of the cable head 7 (as shown by way of example in FIGS. (a)～(
c) and FIGS. 4(a) to (d)), if the cable head 7 is provided with a guide roller, it is located slightly offset with respect to the rotation axis. and a supply bobbin 21 installed inside the bowl of the spindle.
The raw yarn 2 coming from the guide eye 29 is conveyed to the guide eye 29. These two guide eyes 28, 29 define, in relation to the inlet 30 through which the thread 8 enters the outlet channel 31, a right triangle or a triangle whose apex angles are approximately right angles. With such two guide eyes 28 and 29, FIGS.
As shown in (c), it becomes possible to twist the yarn 1 and the yarn 2 without using guide rollers. Also, 2
The book yarns 1, 2 come together at a twisting point 33 located at the middle height of the gap 26, substantially along the axis of rotation of the cable head 7. Such an embodiment means feeding the yarns 1, 2 under very precise tension and nevertheless successfully performing the delicate yarn twisting. In particular, rayon yarn is virtually free from slippage or friction during movement, so
Twisting is well executed.

If required, the cable head 7 can also be provided with a roller having two guide grooves for the yarns 1 and 2, as shown in FIGS. 3 and 4. Figure 3(a)
In the embodiments shown in (c) to (c), the guide roller 40 is provided with a gap 2 by a rotary shaft 41 that enables free rotational drive.
It is installed inside 6. Here, it is desirable that the rotating shaft 41 be made of a member that allows the roller 40 to be easily attached and removed. Furthermore, as shown in FIG. 2, the guide eye 29 that guides the yarn 2 is in a position that is slightly offset from the rotation axis of the cable head 7.

The advantage of such a configuration is that the guide roller 40
Since the thread is fixedly installed inside the gap 26, if the work terminal stops during operation, the risk of the thread coming off and being lost can be suppressed. Furthermore, due to the slight offset between the guide eye 29 and the rotation axis, the yarn 2 is
A tube is formed as shown in (b). Thereby,
In particular, the risk that the yarn 1 will undulate around the yarn 2 at the start of operation can be suppressed. And, since the two guide grooves of the guide roller 40 are located close to each other, the twisting point 33 of the raw yarn is stabilized in the middle between the outer periphery of the guide roller 40 and the entrance 30 of the outlet channel 31 of the twine 8. located.

FIGS. 4(a) to 4(d) show the cable head 7
An alternative version of this type of device is shown which allows the guide roller 40 to be easily installed and removed within the gap 26 of the figure. In this example, FIG.
), 4(d), the guide roller 40
has an axis 41 consisting of two component parts that are close to each other and are subject to the movement of an internal spring. As a result, by pushing back the two ends of the shaft 41, the guide roller 41 can be easily removed.
can be removed. Further, these two terminal ends automatically fit into holes 42a and 42b provided on the side surfaces of the gap 26, and the guide roller 40 can be easily moved by operating in the opposite direction. Furthermore, in this embodiment the guide eye 29 is mounted on the lower part of the cable head 7 so that it can be moved near or far from the axis of rotation. The cable head 7 according to this embodiment has many advantages as follows. 1) The guide roller 40 can be easily attached and removed. 2) Easy to clean. 3) Since the guide roller is removable, it is easy to position the yarns 1 and 2 to be twisted. This makes it easy to realize that the yarn to be twisted is wound one or more times in each guide groove.

The cable head 7 according to the invention also has a tensioning device for the yarn 2 coming from the spindle contained inside the can of the double thread spindle, as shown in the embodiment of FIGS. 5 and 6. It can be easily configured to combine with 6. As is clear from these figures, the integrated assembly consists of two assemblies, namely the tensioning device 6 and the length adjuster 7, the length adjuster 7 being double-screwed by means of the jacket 120 of the tensioning device 6. It is installed directly on the cover 3c of the thread spindle 3. However, this spindle 3 and cover 3c are not shown in FIGS. 5 and 6. In such an integrated assembly, the tensioning device 6 can be manufactured according to what is presented in European Application No. 409,743, so that a detailed description is omitted.

In this embodiment, the installation of the length adjuster 7 according to the invention is carried out using brushes or bearings 12. The brush or bearing 12 has a general cylindrical shape and is located on the top surface 12 of the jacket 120.
It is configured to include a base 122 that provides Oa as a bonding member. This base 122 has a disk shape, and the raw yarn 1
They face the periphery of the balloon 1a as shown in FIG. As mentioned above, the cable head 7 has a structure similar to that shown in FIGS. 2-4, except that it is mounted on the bearing 12 with rotational freedom. For this purpose, the cable head 7 has guide eyes 2 for the two yarns 1, 2.
It has a disk 27 at the bottom that supports the shafts 8 and 29, and a hollow shaft 124 installed inside the cylindrical bearing 12 using a rotary bearing 22. Additionally, a cylindrical surface or skirt 126 is provided at the bottom of the disc 27 and surrounds the cylindrical bearing 12 over its entire height.

As described above, the use of a particularly simple assembly which can be mounted directly on the spindle makes it possible to perfectly align the axis of the adjusting assembly with the axis of the spindle. Additionally, the complex settings of height, parallelism, and positioning required in conventional installations are no longer necessary. Such an assembly provides a disk 12 which can not only serve as a joining member between two parts but also ensure the guidance of the balloon 1a by the yarn 1.
2 and the disk 27 supporting the guide eyes 28, 29 for the yarns 1, 2 are perfect. As a result, any human adjustment errors can be avoided, the force applied to the yarn can be optimized and an optimal activation of the length regulator of the yarn 1 in the balloon 1a can be ensured. The particularly compact adjusting assembly also makes it possible to protect the threads 2 of the can and to avoid inadvertent breaks of the threads 1, 2 during start-up. In fact, the configuration of the length adjuster 7, in particular the presence of a rotating skirt 126 surrounding the bearing 12 over its entire height, makes it possible to retain the thread in the rotating part or skirt 126. This makes it easier to start producing the strand 8 and absorbs tension shocks during production. Such an assembly can also reduce unbalances caused by many rotational movements and can also contribute to reducing vibration and noise throughout the machine. Needless to say, the present invention is not limited to the embodiments described above, but encompasses all selectable types manufactured based on the same technical idea. Preferably, the skirt 126 has a cylindrical shape, but it can also have a conical shape.

[0017]

As explained above, according to the present invention, it is possible to obtain the effect that extremely uniform tension can be applied to the raw yarn and the produced strands. Moreover, the effect of reducing the inertia of the rotating assembly is obtained. In addition, the cable head is easy to maintain, and the yarn can be easily attached to the rollers. Furthermore, the above effects can be obtained with an extremely simple configuration.

[Brief explanation of the drawing]

1 shows a threading machine embodying the technique disclosed in French application No. 2,565,261; FIG.

2 shows details of an embodiment of a cable head (or length adjuster) according to the invention for relating two yarns without guide rollers, (a) a side view; FIG.
(b) shows a sectional view taken along a plane including the rotation axis, and (c) shows a sectional view taken along a plane perpendicular to the rotation axis.

FIG. 3 is a diagram showing an embodiment of the cable head (or length adjuster) according to the present invention, which is equipped with a yarn guide roller, in which (a) is a side view and (b) is a plane including the rotation axis. (c) shows a cross-sectional view taken along a plane perpendicular to the rotation axis.

FIG. 4 is a diagram showing an embodiment of the cable head (or length adjuster) according to the present invention, which is equipped with a guide roller for yarn, in which (a) is a side view and (b) is a plane including the rotation axis. (c) is a cross-sectional view taken along a plane perpendicular to the rotation axis, and (d) is a cross-sectional view taken through the guide roller along a plane including the rotation axis.

FIG. 5 shows an embodiment of an integrated assembly according to the invention.

FIG. 6 shows an embodiment of an integrated assembly according to the invention.

[Explanation of symbols]

1, 2 Yarn 1a Balloon 3 Spindle 3b Bowl 4 Bobbin 6 Tension device 7 Cable head (or length adjuster) 8 Strand 12 Bearing 25 Cylindrical body 26 Gap 27 Discs 28, 29 Guide eye 30 Entrance of exit channel 33 Twisting point 40 Guide roller

Claims (4)

[Claims] [Claim 1] A DT similar to an unwinding double thread spindle capable of twisting two raw threads 1 and 2 together.
Each of the working terminals of the assembly is equipped with a regulator or cable head 7, the first of said two yarns 1 forming a balloon 1a surrounding a bowl 3b, with the said yarn inside said bowl 3b. The second yarn 2 of the two yarns
bobbin 4 is arranged, and the two yarns 1, 2 are aligned by the regulator or cable head 7 consisting of a rotating assembly mounted on a bearing 12, the axis of rotation of which is the axis of the spindle 3. Accordingly, the regulator or cable head 7 has a passage gap 26.
The main part is a general cylindrical main body 25 having a general cylindrical shape over its entire length, two side surfaces 27a and 27b of the passage gap 26 are parallel to the generatrix of the cylindrical main body 25, and the cylindrical The cylindrical main body 25 supports two guide eyes 28 and 29, and its terminal end is freely movable and elongated by a disk 27 having a larger diameter than the cylindrical main body 25.
The first guide eye 28 of the two guide eyes is located near the outer peripheral edge of the disk 27, through which the first yarn 1 forming the balloon 1a passes, and the balloon 1a While the twine 8 is being produced, the assembly is driven in rotation, the second of the two guide eyes 29 being located at or in close proximity to the axis of rotation of the assembly; A second yarn 2 coming from the bobbin 4 installed inside the bowl 3b passes through its interior and these two guide eyes 28, 29 enter the exit channel where the strand 8 comes from the cable head 7. Together with the entrance 30, it defines a right triangle or a substantial right triangle, and in the right triangle, two
The long side of the sides is substantially along the rotation axis of the cable head 7, and is positioned so that the twisting point 33 of the two yarns 1 and 2 is stably at the midpoint of the long side. A thread machine characterized by: 2. A guide roller 40 is provided inside a gap 26 provided in the main body 25 for guiding the two raw yarns 1 and 2 attached by a shaft 41 so as to have a degree of freedom in terms of rotation. 2. The shaft 41 comprises an element that allows the roller 40 to be easily installed and removed, and the second guide eye 29 is located slightly offset with respect to the axis of rotation of the assembly. The thread machine described in 1. 3. The body 25 is moved by a shaft 41 consisting of two component parts that approach each other and follow the movement of an internal spring.
3. A threading machine as claimed in claim 2, characterized in that it comprises a guide roller (40) attached to the thread. 4. A cable head or length adjuster 7 is provided which is attached directly to and coaxially with the jacket 120 of the outlet tensioning device 6 of the spindle so as to have rotational freedom using a cylindrical stationary bearing 12. However, the base 122 of the stationary bearing 12 fixed to the outer cover 120 of the outlet tensioning device 6 is in the shape of a disk,
and facing the circumference of the balloon 1a formed by the outer yarn 1, the support plate 27 of the guide eye of the length adjuster 7 is characterized in that it has an apron or skirt surrounding the stationary bearing 12 over its entire height. Claims 1 to 3
Any one of the thread machines listed in